Leather-cutting machine.



i. EDER.

LEMHER Gimme MACHINE.

APPLICATION FILED MAY 6. 1916.

1 ,293,059, Patented Feb. 4, 1919.

/////L J/ /1 V/ Y H 77 /////////M L] L-f A T'I'ORNEY.

I JOSEPH Enna, or sAN FRANCISCO, CALIFORNIA.

LnATIIEnfCUrrINC MACHINE.

Specification of Letters Yatent.

Patented Feb. 4, 1919.

Appucatidn med may e, 191e. semi No. 95,807.

1o use the same.

This invention relates to leather cutting machines, and particularly to those whic are usedvpfrincipall to trim or round the soles of boots and s oes after the soles hav been secured in place.

Most sole rounding machines have a great y many parts, which not only necessitate more attention and care aid to the machine, but greatly add to thelr expense. The resent invention is strong and rugged, ta es up very little room, and has few parts.v

The objects of the invention are to produce a machine of low cost which is especially adapted for work in a repair shop, which will trim the soles either before or after sewing, which will also trim heels, which can be used in connection with any kind of a-stitcher, round or strai ht needle, and which will save both time an labor.

For a complete understandingy of the invention, reference islmade to the accompanyin drawing in which 'gnre `1 is a side elevation of the machine;

Fig. 2 is a central vertical sectional view;

Fig. 3 is a top plan view of the machine shplwmg a drivlng motor connected to it; an

Fig. 4 is a fragmentary perspective view showing the guard and work holder.

The numeral 1 designates the top. of a work bench or the like to which the frame 2 of the machine is secured by any suitable means. The frame is preferably .cast iron, and is provided with the integral transverse ribs 3 and i which run intermediate the to and bottom of the frame and at one side t ereof. The rib 3 'has arperforated lug 13 extending outwardly from its central' portion and a similar` lug 3 at one side of its center. These lu provide bearings for vertically movable e ements as will be described. y

In vertical alinement with lug 13 bu-t protrudin outwardly from the frame itself 1s a thir lug 13', and in alinement with both lugs, but extending from the frame on both sides is the open-ended bearing 5. This bearing is located at the rib 4. A main shaft 6 turns in bearin 5, and has a cam 7 pulleys 8 and 9 of di erent sizes, and flywheel 10, all secured to it. The cam 7 is preferably of the uniformly .accelerating and retarding type, but other types may be employed. l,

A rod 12 which carries the knife at its upper end 'is vertically reciprocated by the cam 7 throu h an eccentric strap and extension 11, w ich is pivotall joined at 28 to the lower end of said rods.Y Lug 13 has an aperture and lug 13 a similar aperture, the two apertures being in vertical alinement and providin bearings for the reciprocable rod 12. T e upper end of the latter as indicated by the numeral 30 is split to form a bifurcated portion adapted to clamp removably a knlfe 14. The knife comprises a flat substantially rectangular steel blade having a concaved or Scythe edge 31 near its up er end, and is held so as to form practical y a continuation of thev reciprocating rod 12.

To the top 22 of the frame an angle iron or angular member 15 is secured as by screws 17, the said member being curved longitudinally as shown in Fig. 1 to t the frame and is offset therefrom. Its upper angular face thus forms practically a continuation of the curved top face of the frame as Fi 2 illustrates. A narrow slot 23 is provi ed in the upper end 22 of the frame to form (aseuideway for the lmife. This slot is cl by the angle iron, the latter thus acting as a guard to keep the knife in its slot.

The lug 3 like lug 1B has an aperture acting as a bearing for a vertically movable rod .18. The end of this rod, which lies below the lug, has a coil spring 21 heldon` it by any sultable means. The upper end is bifurcated as indicated at34 and holds removably an arm 19 having a guard portion 20 bent at right angl to the part eld by the rod. The ard 2O is itself bent into a U- haped end ocated in a substantially horizontal plane, as Fig. 3 shows, and has the depending angular tooth 35 formed out of one side. The action of spring 21 is to lower the rod 18 and hence the guard; thus the tooth 35 normally presses against the angle iron or member 15 on its top face as illustrated by Fig. 2. This tooth as will be seen from Fig. 3, is thus used as' a Work holder and also as a gage when trimmin the soles. The U-shaped end of the guar 20 overhangs the upper end of the frame and i incloses the knife as the latter moves into its highest position, thus fulfilling its function as `a guard; and its peculiar shape also adapts it to be used as a guide by the operator.

The rod 18 moves in but one bearing, hence allows av certain amount of lateral lay or free motion to the guard 20. This ree movement is not however sufficient to allowthe guard to contact with the moving knife. When desired, the guard can be raised above the knife by grasping the arm 19 at the first bend The machine may be driven through a belt 25 connecting one of its pulleys 8, 9, with a small motor 24. When using the machine the work is heldy as Fig. 3 shows in dotted lines and is fed by hand with the guard member pressing its tooth 35 against vthe sole, thereby serving both as a gageand as a work'holder. The angle iron or member 15 supports the edge of the s ole. being trimmed. The rapidly reciprocating knife vis so shaped that it cuts quickly and yet smoothly through the Y leather leaving a smooth edge rwhere it has cut.

The machine itself is quitek small, being only ten inches high and eight inches long. Being so small, its construction cost is low and its upkeep almost nothing. The power it consumes lalso amounts to a very small item. Butwhile small, it saves a tremendous amount of energyby cutting through heavy sole, leather. Thus I-have found that by its use I can round o" thirty pairs of shoes in fifteen minutes or less, all readyl for the next operation.

While I havefdescribed my invention in considerable detail, I do not wish to be limited strictly thereto, but desire to reserve the right to change and modify my machine in many particulars providing that such changes and modiicatlons come within the scope of the appended claims.

What is claimed is 1. In a sole rounding machine, a frame having a rigid work rest, a knife vertically reciprocablein said frame at one side of the work rest, meansl for driving the knife, and a single element forming a combined guard, gage, guide and work holder arranged in front and onopposite sides of the knife and adapted to normally press against said work rest, saidA element having'a limited slidable movement relative to said work rest and frame in the direction of motion of said knife, and a spring .for restraining said movement.

.2. In a manually fed sole rounding machine, a frame, a knife vertically reciprocable in a slot in said frame, means for driv- 1,aes,oe

ing the knife, and a combined guard, gage, guide and work holder slidably secured to the frame and normally arranged in front and on both `sides of the knife and capable of being raised out of surrounding relation to said knife, and comprising an arm having a guard portion bent at right an les in a substantially horizontal plane, sa1d guard portion being bent into a U-shaped portion, one arm of which is formed with a depending angular tOoth.

3. In a machine of the class described, an upright frame having a slot in its upper end, a knife reciprocable vertically in saidslot, means for driving the knife, an angular member for closing the slot and holding the knife therein while reciprocating, said member also forming a Work rest, and a toothed, springactuated work holder coperating with said knife and work rest.

4. In a machine of the 'class described, an upright frame having a curved top face, a knife vertically reciprocable in said frame, means for driving said knife, a rigid Work rest secured to the top of the frame adje cent the knife and offset therefrom, said work rest being curved to conform with and form a continuation of the top face of the frame, a spring actuated vertically movable work holder normally pressing against the work rest at one side of the knife, said work holder serving also as a rguard for the knife.

5. In a machine of the class described, an upright frame, a knife vertically reciprocable in the frame, means for driving the knife, a work rest secured to the top' of the frame adjacent said knife and offset therefrom, and a combined Work holder and guard movably secured to said frame and including a U-shaped portion having a tooth, said work holder and guard having a spring for normally vurgin the'tooth against said work rest with the -shaped portion inclosing said knife..

6. In a machine of the class described, an upright frame, a knife vertically reciprocable in said frame, means for driving' the knife, a work rest provided at the top ofthe frame adjacent the knife and oset ltherefrom, and a work holder normally pressin against said rest, said lwork holder havin a depending tooth, said tooth elevating. the main portion of the work holder above the rest and being adapted to serve as a ge.

7 In a machine of the class descrl ed, the combination with the upright frame, a drive shaft mounted at the lower end thereof, a cam on said shaft, a rod connected'to and receiving motion from said cam, a knife carried by the upper end of said rod said knife working through a vslot provided in the frame, a work rest offset from the frame and knife, and a combined work holder and guard consisting of a spring actuated vertically disposed rod-mounted in the frame l at one side of the first-mentioned rod, said spring actuated rod having an arm at its upper end bent inwardly at right angles and again bent into a U-shaped portion inclosing the front and two sides of t e knife, said U- shaped portion being provided with a depending angular tooth which engages with the workiest and elevates the said U-shaped portion above said rest.

8. In a machine of the class described, the combination with an upright frame, a drive lower end thereof, a cam on"sadgshafft, a. rod connected to and receiving motion from said cam, a knife carried by the upper end of said rod said knife 16 working through a ide provided in said frame, a rigid wor rest'set from the frame and knife, and a combined work holder and guard consisting of a sprin ac tuated vertically disposed rod mounte in 20 the frame at one side of the first mentioned rod and having at its upper end an arm formed with a U-sha ed portion inclosin the front and two si es of the knife, an having means to engage the work rest.

In testimony whereof I have hereunto set my hand this 27th day of April A. D. 1916.

JOSEPH EDER. 

